Inexplosive steam-boiler.



EMILE MASLIN, LESTAQE, FRANCE. i

Iimxrnosrvn STEAM-soltar..

To all 'whom it may concern:

Be it known that LFM'ILE MasmN, a citizen of the French Re ublic, residingI at LEstaque, Banlieue de ilarseille, Bouc esclu-Rhne, in the Republic of France, have invented certain new and useful Improvements in Inexplosive Steam-Boilers, of which the following is a specification.

This invention relates to an improved inexplosivesteamboiler in which the boiler is insulated and separated from the furnace, the heat being transmitted from the furnace to the boiler by means of a fluid circulatin in endless tubes. The elements consisting e endless tubesare located with their lower ends in the furnace and flue and with 'their upper iendsinthe boiler so that the' liquid contained in said elements is vaporized 1n the lower end of the sa'me to condense in the upper end and to return again to the lower end.`

In the accompanying drawings the invention `is shown.

Figure l is a cross section of Fig. 3 along the line U`-V, Fi 2 is a cross section along the line Y- of Fig. 3, and Fig. 3 represents a longitudinal section taken along the axis of the boiler and the flue.

The gases of combustion and the flames are conducted from the grate t of the furnace through the flue b (Fig.` 3) which they traverse from end to end to escape through the chimney. The walls of the `flue and the walls of the furnace are of sheet metal and internally `lined with as to be effectively protected against the destructive action of the fire and to reduce the loss of heat by radiation.

The simplest type of thcrmo-siphon consis'ts of anendless tube e (Fig. 2) which is curved so as to form a lower horizontal part situated in the fine, and an upper vertical part penetrating into the boiler. Where the tubes traverse `the wall or shell of the boiler stufhng-boxes :are arranged. Each of the thermo-siphons communicates permanently h v means of a capillary tube'f (Fig.'2) with a small air reservoir g which is closed by a lid. This reservoir is destined to permit the free expansion of the liquid which fills thc siphon and further tot-facilitate the refilling of thesame. .X capillary tube h upon the upper end of the siphon permits the escape of the air during The reservoir g and the capillary tube It must be closed hermetically after the Siphon Specification of Letters Patent. Application tiled January 28, 1911. Serial No. 605,252.

4the heat refractory material sor the filling of the siphon.4

Patented A111222, 1913.1 v

has been filled which is very important for the pro er workin of the apparatus. The` tubes w uch form tie thermo-slphons can be v of iron, copper or aluminium according to the nature of the liquid which circulates in said siphons. If the thermo-Siphon has been once mounted and filled, it does not require any` further attention; as 'soon as the hot gases pass through the fiue, the liquid in the siphon begins to circulate and to transmit lutely regularly and automatically.

It is evident that the heating surfaces of the thermo-siphons at the rear `end of the flue have to be much larger than those of the lthermo-siphons which are nearer to the from the fine to the boiler abso-` inlet of the flue so as to compensate for the gradually decreasing heat of the gases from v combustion. In order to increase the `heating surfaces, the part m of the tube z' (Fig. 3) could be wound in a spiral, or as shown in Fig.13 the tube 7' or `Il: is divided into two, four, eight, sixteen, cbc., arms. As the liquid which circulates in the siphon tubes does not form an)7 of said secondary branches of the tubes can he very small so that avery large heating surfaceis obtained without increasing the weight of the device or the space required.

Thelsurface of the thermo-sphons destined to communicate the heat to the generator can be greatly increased by adding external ribs Iof metal to the parts of the tubes which penetrate into the boiler, said ribs Z (Fig. B) being soldered uponsaid tubes. The radiating surface of the tubes could also hcincreased by giving a spiral shape to said tubes (see m Fig. 3) or .by `dividing them into arms.

deposit the inner diameter c The heating device n (Fig. 3) is com-v) poscd'of a small nest of .tubesmade of forged iron, having an inner diameter `of from eight to twelve millimeters. These tubes, the same as those ofthe thermosiphons, can beeithcr straight or spiralshaped, m (Fig. 3). They all communicate at their lower` end with the feed tube o (Fig. 3) and at thc upperend with asmau reservoir p (Fig. 3) which serves to separate the steam and upon which is mounted the steam tube Q (Figs. 1 and 3). This steam tube traverscs the wall of the steam-generator in a stuffing-box and it terminates at the upper end of the condenser 1' (Fig. l). This condenser itsclf is composed of tubes of very small diameter which are made of ron or les copper,` straight or; spiral shaed. The

, circulates in vaporizing in the Hue, condensing in the generator, returning in liquid state `tothe flue, vaporizingagain and so -forth. As is the case with the thermosiphons the transmission of the heat is effected automatically and requires no atten- I claim:-y l. An improved inexdplosive steam boiler as described andV shown `1n r,the drawings com- 'prislng `in combinationthe furnace with heating lues, the boiler insulated and separated from said furnace, `elernents each formed of an endless tube located with vthe lower part in said furnace and with the upper Earl; in said boiler, a liquid `filling said tu es for transmitting thefheat from the vfurnace to the boiler, said liquid Vaporizing in the lower part of the tube and Acondensing in the upper part ofthe same.

' 2. An improved inexplosive steam boiler comprising in combinatlon the furnace with heating flues, the boiler insulated and separatedl from said furnace, elements each formed vof an endless tube connecting said furnace with said boiler, the lower part` of said elements `projecting in the furnace and being formed so as to increase the heating surface, the upper part of said elements located in the boiler and formed rso as to lincrease `the radiating surface',- a liquid lling said tubes for transmitting the heat. from the furnace to the boiler, substantially as described and shown and for the purpose set forth. v o

In witness `whereof 4I have `hereunto set' my hand in the presence of two witnesses.

- EMILE MASLIN, Witnesses: v

on GAMroN, 4 PIERRE LAUVAIRE. 

